[dpdk-stable] [dpdk-dev] [PATCH v3] net/mlx5: fix init with zero Rx queues

[Shahaf Shuler]

Sunday, May 5, 2019 2:44 PM, Dekel Peled:
> Subject: [dpdk-dev] [PATCH v3] net/mlx5: fix init with zero Rx queues
> 
> Recent patch [1] added, at the end of mlx5_dev_configure(), a call to
> mlx5_proc_priv_init(), initializing process_private data of eth_dev.
> This call is not reached if PMD is started with zero Rx queues.
> In this case mlx5_dev_configure() returns earlier due to the check:
> 	if (rxqs_n == priv->rxqs_n)
> 		return 0;
> In such a scenario, later references to uninitialized process_private data will
> result in segmentation fault.
> For example see in function txq_uar_init().
> 
> This patch changes the check logic. The following code is executed if (rxqs_n
> != priv->rxqs_n), and skipped otherwise.
> Function mlx5_proc_priv_init() is always invoked, to ensure process_private
> data is initialized.
> 
> [1]
> https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fpatch
> es.dpdk.org%2Fpatch%2F52629%2F&data=02%7C01%7Cshahafs%40mel
> lanox.com%7C18b3d5bb065348a57ef408d6d14f6b26%7Ca652971c7d2e4d9ba
> 6a4d149256f461b%7C0%7C0%7C636926536374830910&sdata=7KXyV1U7
> 9P%2Bhc4HtZ8W05m95ZYyhY0m0Yc3A9NECvwo%3D&reserved=0
> 
> Fixes: 120dc4a7dcd3 ("net/mlx5: remove device register remap")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Dekel Peled <dekelp at mellanox.com>
> Acked-by: Yongseok Koh <yskoh at mellanox.com>

Applied to next-net-mlx, thanks.